Molding apparatus.



Nb. 696,55l. Patented Apr. I, 1902.

C. R. DAVIS.

MOLDING APPARATUS.

(Applicatwn filed Sept. 24, 1901.) (No Model.) 2 Sheets-$heet I.

WITNESSES f a f THE Mann's PETERS no mom-1pm.. wnsmnamn. u. c.

INVENTOR No. 696,55l. Patented Apr. I, I902.

C. R. DAVIS.

momma APPARATUS.

(Application filed Sept. 24, 190-1.)

(No Model.) 2 Sheets-8heet 2.

' WITNESSES INVENTOR .QZOML'R Attorney m: "cams mans 00.. Puov au'mc. wpsumcwou. u. c.

' Darren @TATES Pa'rntrr rmcn.

CALVIN R. DAVIS, OF SOUTH BEND, INDIANA, ASSIGNOR TO SOUTH BEND IRON WORKS, OF SOUTH BEND, INDIANA.

MOLDHNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 696,551, dated April 1, 1902.

Application filed September 24, 1901- Serial No. 76,396. (No model.)

.To (0 whom it may concern:

Be it known that I, CALVIN R. Dnvrs, of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Molding Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in molding apparatus, and more particularly to means for cleaning the sand off the upper face of the presser-plate.

As is well known, any sand that may be on the presser-plate must be cleaned off before the mold is pressed, as otherwise the mold would not be pressed square, on account of the sand getting between the sand-box and the press-plate. The ordinary way of cleaning the sand from the presser-plate has been to use a brush, either operated by hand or attached t0 the machine and operated by hydraulics, requiring a number of valves and pipe-fittings. These valves allhave to be repaired and repacked frequently, preventing the use of the machine at times, and the valves being located on the top of the molding-machine when they leak (which they frequently do) cause the wetting of the patterns and pattern-plates, as well as the machine parts, and resulting in rusting them and impairing their operation. The brush does not remove the sand from the presser-plate effectually, always leaving some fine sand, which gradually balls up on the presserplate where the latter comes in contact with the sand-box.

The object of my invention is to provide appliances by means of which the sand can be effectually removed from the face of the presser=plate without encountering the defects and annoying objections incident to the structure heretofore employed for removing sand from the presser-plate.

A further object is to provide means for cleaning the presser-plate of a mold by which all parts of said plate can be deprived of sand through the medium of an air-blast under the control of a single operating-lever.

Fig. 3 is a plan view. Fig. 4 is an enenlarged detail views showing the valve-op- 6 5 crating devices.

A represents the top plate of a molding-machine, and B the presser-plates, the latterbeing adapted to be operated by a hydraulic or other motor 0.

To one edge of the top plate A a sleeve 1 is secured and serves as a bearing for a vertical shaft 2, the lower end of which is bent inwardly to form an inclined arm 3. To this arm a nozzle at is secured, as shown in Fig. 1,

so as to direct a blast of air onto the upper face of the presser-plate B, and means (hereinafter described) are provided for turning the shaft 2 to swing the arm 3 and nozzle se cured thereto in the arc of a circle for the So purpose of projecting the air-blast over the full extent of surface of the presser-plate. Air will be conducted to the nozzle tthrough a flexible hose 5, connected with avalve-casing 6, and the latter is supported above the top plate A by means of a standard 7, preferably in the form of a pipe. Air is conveyed to the valve-casing through a pipe 8 from any convenient source of supply.

A rock'shaft 9 is mounted in bearings 10, 0

secured to the top plate A, and is provided at its outer end with a crank-arm 11. The upper end of the shaft 2 is also provided with a crank-arm 12, having an eye 13 in proximity to its free end for the reception of a pintle at one end of a rod or pitman 14, the other end of said rod or pitman being loosely connected with the crank-arm 11 on the rockshaft 9. The inner end of the rock-shaft 9 is made angular for the reception of a guido- I00 arm or casting 15. The upper end of the arm or casting 15 is widened, as at 16, and provided at one edge with a shoulder 17. Below the widened upper end of the arm or casting the lower end of an operating-lever 18 is pivoted to the latter. This lever is provided at a point above the arm or casting 15 with a pin or lug 19, normally disposed in the path of an arm 20, which projects upwardly from one end of a bar21, secured between its ends to the stem 22 of valve 23 in the valve-casing (5. One end of the bar 21 is provided with a knob 24, disposed below the longitudinal axis of the bar, and to this knob one end of aspring 25 is attached, the other end of this spring being secured to the top plate A and serving to normally hold the valve closed. When the lever 18 is moved forwardly by the operator, the pin or lug 19 will first engage the arm 20 of bar 21 and move the same sufficiently far to raise the knob 24 (to which the spring 25 is attached) slightly above the axis of the valve, when the spring 25 will act to complete the movement of the bar and fully open the valve, thus permitting the air to flow to the nozzle 4'. The continued movement of the lever will cause it to engage the shoulder 17 on the arm or casting 15 and turn the latter to rock the shaft 9 and transmit motion through the pitman 14 to the shaft 2, causing the latter to turn, and thus swing the nozzle sufficiently to project theIair-blast over the entire upper surface of the presserplate.

A stout spring 26 is attached at one end to the top plate A and at the other end to the crank-arm 12, and when the lever 18 has been moved to the end of its throw, effecting the operations above explained, and then released by the operator the spring 26 will act to return the shaft 9 to its normal position, and the motion thus imparted by the spring 26 will be transmitted through the pitman and rock-shaft to the lever 18 and return the latter. As the lever is being thus returned the pin or lug 19 thereon will strike the bar 21 and return it, against the resistance of the spring 25, to its normal position, thus closing the air-valve.

Slight changes might be made in the details of construction of my invention without departing from the spirit thereof or limiting its scope, and hence I do not Wish to limit myself to the precise details herein set forth.

I-Iavin g fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a molding apparatus, of a nozzle mounted on the apparatus to oscillate, meansfor conveying air to said nozzle and means also mounted on the apparatus and connected with said nozzle for imparting an oscillatory motion to the latter.

2. The combination with the top plate of a mold and a presser-plate, of a nozzle mounted on said top plate and adapted to discharge upon the presser-platc, a valve for said nozzle, and devices mounted on the top plate and connected with said nozzle for oscillating it.

3. The combination in a molding-machine, of a nozzle, means for conveying air to the nozzle, a valve for controlling the supply of air, a lever and devices cooperating with said lever to operate the valve and oscillate the nozzle.

4. The combination in a molding apparatus, of an oscillatory nozzle, means for conveying air thereto, a controlling-valve and means for operating said valve and oscillating the nozzle.

5. The combination in a molding apparatus, of an oscillatory nozzle, means for supplying air thereto, a valve, means for opening said valve and oscillating the nozzle, and means for returning the nozzle and closing the valve.

6. In a molding apparatus the combination with a nozzle, means for moving it and means for conveying air to it, of a valve for controlling the air-supply, a spring holding the valve normally closed and means for releasing said spring to open the valve when the means for moving the nozzle are operated.

7. In a molding-machine, the combination of a shaft, a diagonal arm on said shaft, a nozzle secured to said arm, means for oscillating said shaft and means for conveying air to said nozzle.

8. In a molding apparatus, the combination with a shaft and a diagonal arm projecting therefrom, of a nozzle secured to saidarm, means for conveying air to said nozzle, a rockshaft connected with the first mentioned shaft for operating it, and means for operating the rock-shaft.

9. In a molding apparatus, the combination of an upright shaft, a nozzle carried thereby, a crank-arm on said shaft, a rock-shaft, a crank-arm on the rock-shaft, a pitman con necting said crank-arms, and means for operating the rock-shaft.

10. Inamoldingapparatus,the combination of an oscillatory shaft, a nozzle carried thereby, means for conveying air to the nozzle, an air-controlling valve, a lever, means cooperating with said lever to operate the valve, and devices intermediate of the lever and oscillatory shaft for operating the latter.

11. In a molding apparatus,the combination with an oscillatory nozzle and means for conveying air thereto, of a valve for controlling the air-supply, a lever, devices intermediate of said lever and the nozzle and devices inter mediate of the lever and valve for opening the latter and oscillating the nozzle when the lever is thrown forwardly, and a spring for returning the nozzle and lover and closing the valve.

12. In a molding apparatus,the combination with an oscillatory nozzle, an air-supply pipe and a valve in said pipe, of a bar on the stem of said valve, having an arm at one end, a spring attached to said bar below the axis of the valve, and a lever adapted to engage the arm on the bar and raise the connection of the spring to the latter above the axis of the valve to permit the spring to open the valve.

13. In a molding apparatus,the combination with an oscillatory nozzle, and means for supplying air thereto, of a rock-shaft for oscillating the nozzle, a guide-arm secured to said rock-shaft, a shoulder on said arm and a lever pivoted to said lever below said shoulder.

14. In a molding apparatus,the combination of an oscillatory nozzle, a pipe for conveying air thereto, and a valve in said pipe, of a rockshaft, devices intermediate of the rock-shaft ing witnesses.

CALVIN R. DAVIS.

Witnesses:

THOMAS A. FREEMAN, FRANK W. ADAMS. 

